Nutrient Database

Glycine

amino acid

Approved

General information about nutrients. No diagnosis, no medical advice. If you take medication, are pregnant or have a medical condition, talk to your doctor before taking supplements.

EveningFasting safe

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Overview

Simplest amino acid and a building block of collagen and glutathione.

Interactions

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Glycine and Mg: different receptor pathways

Glycine acts on NMDA receptors, while magnesium is involved in GABA receptor function. The two act through different pathways.

Top 5 food sources

Bone brothgelatinpork skinchicken skinfish

Expert opinions

Dr. Strunz

Strunz recommends 3 g glycine 30 to 60 min before bed. Glycine is a primary building block of collagen (about 33% of collagen amino acids) and, alongside cysteine and glutamate, of glutathione. It can be added to coffee or tea, dissolves readily and has a slightly sweet taste.

Recommended dose: 3–5 g

Source: Dr. Strunz

Expert profiles summarise publicly available statements. The named people do not cooperate with Stackwell and have not authorised these summaries. Not medical advice.

Expert consensus: Strong

Well tolerated, commonly taken at 3 g before bed.

Glycine — Stackwell